erp5_base: disable split and defer action since it seems have bug

user should use solve divergence for split and defer

bt5/erp5_simulation/WorkflowTemplateItem/portal_workflow/delivery_causality_workflow/transitions/split_and_defer_action.xml

@@ -16,11 +16,11 @@
         </item>
         <item>
             <key> <string>actbox_name</string> </key>
-            <value> <string>Split and Defer</string> </value>
+            <value> <string></string> </value>
         </item>
         <item>
             <key> <string>actbox_url</string> </key>
-            <value> <string>%(content_url)s/Delivery_viewSplitAndDeferDialog?field_my_workflow_action=split_and_defer_action</string> </value>
+            <value> <string></string> </value>
         </item>
         <item>
             <key> <string>after_script_name</string> </key>